2014-2017 Yamaha YZ450F
For the next generation YZ450F, Yamaha engineers focused on bringing back some of the brutality to the YZ450F while striking the balance with its easy-to-ride feel. New intake cams, 1mm larger (37mm) intake valves, .5mm larger (30.5mm) exhaust valves and new intake and exhaust ports helped the Yamaha to make more power up top while a flat-top piston replaced the domed piston but retained the same 12.5:1 compression ratio as before to improve low- and mid-range torque. A new bilateral beam aluminum chassis moved the front wheel 10mm closer to the center of the bike and featured a stronger swingarm pivot. The chassis also had more front wheel weight bias to improve front-end traction when cornering.
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